Abrading machine



W. C. GROE Nov. 8, 1932.

ABRADING MACHINE 3 Sheets-Sheet rlll, n

n Allu w fd@ Mm (GNL Original Filed Feb. 23, 1926 Nov. 8, 1932. W, .GROB 1,886,878

ABRADING MACHINE Original Filed Feb. 25, 1926 3 Sheets-Sheet 2 59, l 9 j I 60 h?? o l, i j

Nov. 8, 1932. w, c. GROB 1,886,878

ABRADING MACHINE v Orig'inhal Filed Feb. 23, 1926 3 Shee/tS-Sheet 3 :IEN-EY Patented" Nov. 8i, 1932 win-Limit o. ertoe. or" '.ioiiiiiio,` offroL ABRAniive MCHINE Application flied February 23; ieaa'seriai No; 352,939'. Renewed september e6,4 1932.l

This inifention relates to dressing or treating surfaces of stock.

This invention has utility when incorporated for grinding and bufting metallic strips, asantomobile bumpers. Referring to the drawiiigsg- Figi. 1 is a side elevation of an embodiment of the' invention in a machine for grinding rough metallic strip" stock, and after plating thereof, the bufiingof such stock; Fig. 2 is a plan view ofthe machine of Fia l;

Fig. 3 is an end view of the machine'of Fig. 2 frointhe left;V

Fig. 4 is a Adetail view of one of the abrading jacks and its carri-er;

Fig. 5 is a detail view of a stock holding device for holding thematerial acted upon in position withits support during the abrading operation g.

Fig. Gis a perspective view of an autom@ bile bumper strip, such as may be handled' hereunder, for continuous operation;

for the installation hereunder;`

Fig-Sis a fragmentary view of an abrader automatic shifter device as controlled by the stock being treated or surfaced; f

Fig- 9 is a section onthe line X-IX, Fig. 3U' S, looking in the` direction ofthe arrowj;

Fio'e 10 is a fragmentary view on the liiiel X- Fig. 9, looking in the direction of the arrow; i

Fig. 11 is a partial view of the control device of Fig. 8, showing the travel of the device for shiftingthe abradingmember awayr Fig.A 13 is a'plan vview of the device in trip or clearance position as controlled byStock moving therethrough to allowthe abrading; element to be retaiiiedin working position;

tripped positionassliownin Fig: 11"; and

Fig. 15 is a fragmentary viewrof a portion of the conveyor beltshowingl the Vflights thereon.

Mainframe lis-'shown as mounting `motor Fig. 7 isa wiring diagram of the control Fig. 14 isa -planview ofthe device'inthe 2 'havingA shaft 3' driving 4 iniiiesh` with Worm' wheel` 5 on shaft 6l provided v sprocket wheel 7 effective throughmsfprocket chain 8 for operating sprocket wheel'- gon shaft 10. This shaft lOlias Athereon pulley 11 about which extends endless belt or coiiveyor 12, which, attheremote portion'of the frame 1 from this shaft 10, passes about pulley 13 on shaft 14.v Thel conveyor, belt 12 is provided with flights 15, 1:6, 17, 18, andl9.` j

The mainfraiine lv (Fig. 9) is provided with ledge 20 upon the upper surface of whichtravels the work supporting conveyor belt l2. This ledge 2O has margin'` strips21,

22, constituting a way to holol the conveyor belt 12 against lateral shifting, whileover-l hangs 23, 24, preclude jumpingofthe belt outofthis' way and allow the upward pro# jectionof the seriesof flights Abetweentliese overhangs 2 3, 24, and also the tifa'vel of strip upon which the abrading operation istobe performed. The strip, herein shown' i s a wrought' metal bumper for an aiitomofbile,4 having roundedterinini 2 5 which seat be tween the respective flights lo, 19,-while the rest of the flights 16, 17',f1 8, therebetween sustain the intermediate outwardly projecting porton 2 6 offlobumpop Y; Power Supply lines 295.30oxtooo1to Start ing switchl mounted onthe framel (Figs, 1, 7) so that when ast-rip of stock tobe operated up'on'isv placed inV the mach'ine, the machine may be Ystarted jby throwing in the' switch 31 for causing the motor 2 to effect travel of the stock. Mountedon the frame 1 adjacent the yway .2 0, isa series of brackets Y (Fig. 5) 32 providingibearings for arms 33 carryingrollers l34. Fixed with the arms upon the opposite Sides; ofthe ,bearings 132. are arms 35. from which extend tension` springs 36 effectiveA for swinging the roll- Y ers 34 toward the work support12,.thereb'yv f providing a'yieldable device for holding'the work in the channel provided therefor on the work support or conveyor 12. i

Transversely of the frame l, rocklshafts' 37 are provided, These' lrock shaftsl have thereon depending lugsl 38,y providing ful;A crum bearings, for carriers or auxiliaryv tors 40.

frames 39. The carrier 39 is a bufling jack unit mounting affording a rockable platform upon which is disposed motor 40 having shaft 41 provided with pulley 42 from which eX- tends belt 43 about pulley 44 on jack shaft 45 mounted in bearings 46 carried by bracket 47 upstanding from the carrier 39 upon the opposite sid-e of the fulcrum of said carrier from the motor 40. This shaft 45 adjacent the inner bearing 46 is providedV with (Fig. 3) pin 48 coacting in groove 49 like an oscillator or axially shifting drive for this rotating jack shaft 45. The remote portion of this jack shaft 45 is provided with an abrading element 50v detachably mounted thereon by nut 51. rlfhis abrading element 50is disposed above the channel or upper reach of the belt12. f

EachY frame or carri-er 39, adjacent the motor 40, is provided with supplemental brackets 52, 53. The bracket 52, extending upwardly, is provided with adjusting screw 54 coacting with stop 55 (Fig. 3) to limit the rocking of the carrier 39 in its inoperative position when the abrading element 50 is thrown upward away from active position, and the motor 40 serves by its weight to hold the device thus rocked. The bracket 53 is provided with set screw 56, which in the reverse rocking of the carrier 39, abuts stop 57 on the frame 1, and thereby limits the downward or operative position of the abrading element 50.

Power lines 29, 30, extend past the switch 31 for starting the conveyor belt motor 2, and have branches 58, 59, therefrom to starting boxes' or switches 60 for the respective abrading ack's, thereby providing manually selective control for cutting in the respective moln practice, this series of jacks along a common-reach of the conveyor 12 may 'have the abrading element 50 for rough grinding, abrading element 61 for liner grinding; and in practice it may be found desirable to have a number of the coarse grinding rolls to be followed by more than one of the fine grinding rolls on account of the amount of material to be taken ofi", and the character of material beingacted upon. Furthermore, inthe character Vof this machine, when these disks wear down, there may be adjustment for the depth of grind or cut on the work by the operation of the screw 56. When this abrading element wears down in use in the adjusted plane or planes. Ready substitution of a new stone or disk` thereon may then be had in effecting replacement by the removal of the nut 51. Again, after the stock has been given the rough treatment, the

6o material may be plated or given other type of finish and again sent through the machine for burnishing or buliing operations, to which end, the jack or jacks to the extentdesired may be provided with bufting disks on all thereof, or on a desired number thereof,

which buliing disks 62 have a glued disk carrying tripoli or other abrasive, while a succeeding disk 63 may be for the liner polish and charged with rouge.

The carriers 39 are provided, besides the lugs 38, (Figs. 1, 4) with lugs 64, 65, in which are mounted rods 66 having cranks 67. Each rod 66 is provided with an intermediate threaded portion 68 upon which is mount-ed nut 69 carrying loading means or counterweight 70 below the fulcrum bearings 37, 38, and transversely thereof. Accordingly, by operating the cra-nk 67 there may be effected a traveling of the nut 69 toward or past the shaft 37 in thus determining the degree and direction of the counterweighting of this carrier 39. rlhis affords a nice adjustment for pressing the abrading element on to the work, and is peculiarly advantageous herein Afor the'reason that in the handling of the stock herein disclosed, there is operation of this abrading element Vin a plurality of planes; the plane of the terminal portions 27 the plane of the intermediate portion 2G upward therefrom; and additionally the approaches 28 therebetween.

in view of the operation of this device beyond different planes, it is desirable for automatic operation that the active element-s be prevented from coming in Contact with the work support or the flights mounted thereon. To this end, the bearing 46, adjacent the way 2O,V carries a supplemental bracket 71 mounted thereon by screw 72. Knurled head screw 73, (Fig. 8) carried by its bracket 71, cooperates with slot 74 in depending bracket 75 for adjusting the position of this bracket 75 carrying roll 76. This roll 76 may be adjusted to be in proximity Vto portion 77 of .the cam riser 78. rlhe idle position of the a Hat portion 79, all carried by block 8O having pivot pin 81 movable in slot 82 of plate 83 on the frame 1. This block 80, mounted by the pivot pin 81, has remote therefrom an eye 84 from which extends tension spring 85 to the frame 1 for holding this block 80 in parallelism with the conveyor 12 and against stop 86 mounted on overhang 24. Adjacent the eye 84, the block 8O is provided with. pin 87 (Fig. 12) mounting an extension 88 having pivot bearing 89 for trigger 90 normally hanging against the overhang-24, and extending over the belt 12 into the path of flights 16, 17, 18, but clear of the flights 15, 19. When the article of stock in the instance of a strip of material to be treated, is traveling along the channel propelled by this conveyor l2, the inclines-28 guide the trigger 90 so that it rocks on its pivot bearing 89 and is inactive to any operation hereunder.

However, in practice, with the distance bethe distance between the strips of stock on essere i ed end of this slide 93 being shoved outward inthe slot or guide 94- by an article of stock on the belt 12. This slide 93 swings the block 80. upon its pivot bearing 81 against the tension action of spring 85 and thus serves, when there is` stock on the belt 12 to hold the trigger clearof the flights on the belt 12.

lf the operator should not feed an article of stock on the moving belt 12, the spring 85 would be .effective for pulling the block 80 against the stop 86. The slide 93 wouldY not be operable to resist such action and the trigger 90 would be overhanofing the way or travel for the flights. rlhe next one of the flights 16, 17, 18, coming along would strike the trigger 90 and shift the block 80 with its pivot pin 81 inthe slot 82, thereby causing the cam 7 8 to ride under the roller 7 6 so that the roller 7 6 would 'approach the way 7 9 andv thus lift the shaft 45 and thereby rock the carrier 39 to such an extent that the abrading element 50, or other element carried by the shaft 45, would be not only clear of the flights and the carrier on the conveyor, but clear of even operating upon work which might project upward therefrom. lThus, the

device is automatically shifted into inoperative position. This longitudinal shifting by the travel of the conveyor is to an extent to bring recess (Fig. 12) in the block 80, into registry with plunger 96 mounted in the stop 86 where spring 97 will effect thrusting of this plunger 96 into the rec-ess 95 for holding this block 80 retracted and thus effective for retaining the roller 76 lifted and the abrading element out of operative position. In this shifting of the block 80, trigger 98 pivoted at 99 on the blockv 80 upon the opposite side from this recess 95, shifts to have cam portion 100 of this trigger 98 ride under adjusting screw 101 carried by overhang 102 for rocking this trigger 98 against the resistance of spring 103 (Fig. 10) to have retaining seat 104 of this trigger 98 swing clear of outwardly projecting portion 105 of the extension 88 so that in the furthertravel of the flight, which has eected the sliding travel of the block 80, the trigger 90 may be swung toward the block 80 and clear of the flight way. This Vtrigger 90 is accordingly thrown out of interfering travel and this device holds the abrading element in operative position where work has not been fed.

When a supply of the material to be acted upon again is given to the machine, and it travels along the channel on the conveyorbelt 12, there is an automatic resetting of the 'abrading device for, (Fig. 12)v when -the stock rides under roller 106 gon the pin 96,

the slide 93 is `shifted transversely ofsuch belt 12 and rocks the block 80 on its pivot 81 70 clear of the pin 96 limited in its outward travel by collar 107 riding against flange 108. Thusreleased from retraction, the spring 85 pulls the block 80 back tohave pin 109 strike the projection 105 of theextension 88 rocking such into reset position for the trigger 90 to ride over the stock. While the block 80 is thus retracted, the lroller 76 settles` downV the cam way 78 to above the operative portion 77 thereby allowing the carrier 39 controlled by the counterweight 70 to rock with the shaft 45 in bringing the abrading element Vinto operative position to the supplied work. i

Accordingly, herein, there .is an automatic safety pro-vision against the abrading wheels attacking the work support in the absence of work, with a control for rholding the wheels in operative'-rposition atfk all times when work is fed. rlhere is herein a ready means for shifting any desired number of jacks into or out of operativeposition with the provision for holding the acks inoperative position and permitting verticalV movement tolallow for variations in height of the work piece, The oscillator 48, L19,; (Fig. 3) gives the wheel a transverse movementin addition to its rotation so-that there isavoid.- ed any tendency for the abrading element to secure o-r emphasize imperfections in the stock. The position of theswitch 31 is such that in opening thereof, there is simultane-` ously, a stopping of all of the jacks, and the travel of the conveyor. However, there must. be a starting ofthe conveyor before any ack motor may be operated, and any desired number of jack motors may be operated.

VVh'at is claimedV and it is desired tosecure by United States Letters` Patent is:

1. An abrading machine comprising a traveling support for work including flights, an abrading element, and means for throwing the abrading element out of operable position, such means being engaged .by a work support which is exposed when work is noty being fed through the machine.

2. A frame determining a plane for work, a series of parallel fulcrum bearings approximately in a plane and carried by the frame below said plane of the work, carriers rockably mounted in said fulcrum bearings to swing toward the plane of the work in swinging toward the plane of the axes of the bearings, and an abrading jack and drive therefor mounted on each carrier.

3. A frame determining a plane for work, a series of parallel fulcrum bearico the axes of the bearings', a rotary dressing wheel-mounted on veach-carrier, and driving means for rotating said wheel, the driving .means for the respective. wheels being clear bearings Aimately in a plane and carried by the `frame.

below said plane of the work, carriers rockably mounted in said ulcrum bearings to swing toward the plane of the work in swinging toward the plane of the axes of the bearings, a rotary dressing wheel mounted lon each carrier, and a drive on each carrier eccentric oi" t-he ulcrum bearing mount-ing for the respective carriers. A

5. Aframe determining a plane for work, a series of parallel fulcrum bearings approximately in a plane and carried by the Jrame below said plane of the work, carriers vrockablymountedin said ulcrum bearings to swing toward the plane of the work in swinging toward the plane of the axes of the bearings, a rotary dressing wheel mounted on each carrierr one way from the fulcrum bearing therefor, and a Vdrive on each carrier disposed on the other side of said bearing from the wheel.

6. A frame determining a plane for work, a series of parallel ulcrum bearings approximately in a plane and carried by the frame below said plane of the work, carriers rockably mounted in said ulcrum bearings to swing toward the plane of the work in swinging toward the plane or" the aXes of the bearings, and a rotary dressing wheel and drive mounted on each carrier and disposed oppositely as to said bearings in counter-balanced relation.

7. A rotary dressing wheel, a horizontal axis rockable mounting` therefor, a work carrying support providing a line for work travel and toward and from which'support said wheel has a tree range of rocking movement toward the horizontal plane of the rocking axis, driving means for progressing the support past the wheel in the plane of the wheel rotation during said rotation, and tangential 50. working path locating loading means adjustable to rock the mounting in either direction in said Jfree range of wheel rocking movement for determining the pressure of the wheel on the work during the shifting of said work when on said support past said wheel. Y Y

8. A rotary dressing wheel, a carrier for the wheel, a. horizontal axis ulcrum on which said carrier is rockable, said carrier having a guide extending below and both ways past the fulcrum, a drive for the wheel, said drive and wheel being on opposite sides of the fulcrum, and tangential path locating weight belowsaid ulcrum shift-able past the fulcrum along said guide to supplement the plane for work,

drive weight or to supplement the wheel weight in varying the pressure of the-Wheel on the tangentially traveling work.

9. A rotary dressing wheel, a carrier, a horizontal axis ulcrum on which said carrier is rockable, a straight line guide, a continuously traveling work support limited to movement along said guide in the plane of the wheel rotation for progressing work past said wheel, a drive for the wheel, said drive and wheel being on opposite sides of the fulcrum, and a frame mounting the ulcrum below the plane of the work on the support to overhang the support toward the direction of the work as approaching the carrier.l

10. A rotary dressing wheel, a carrier, a ulcrum on whichr said carrier. is rockable, a straight line guide, a continuously traveling work support limited to movement along said guide in the plane of the wheel rota- -ion for progressing work'past said wheel, and tangential working path radial distance locating mechanism comprising an adjustable stop meansoppositely extending on the same side of said fulcrum and carried by the carrier, and fixed means as to which the support travels in its tangential path as to the carrier and with which iixed means the adjustable stop means coact for limiting the rocking movement on said ulcrum.

ll. A rotary dressing wheel, a` carrier therefor, a straight line guide, a continuously traveling tangential path providing work support limited to movement along said guide in the plane of the wheel rotation for progressing work past and below said wheel, a fulcrum for the carrier below said support on which the wheel may rock from the fulcrum toward the approaching work on the support, and a drive on the carrier on the opposite side of the fulcrum from the wheel for rotating the wheel.

l2. A support for positioning work, a r0- tary Vdressing wheel for the work, a wheel mounting permitting the rotating wheel freely to iind its center, ulcrum for the mounting below said support, a drive on the mounting on the opposite side oi the fulcrum from the wheel for rotating the wheel, and a counterweight below said 'ulcrum adjustable from one side past said ulcrum to the other side for thereby varying the work disturbance of the wheel free position for rotation.

13. A rotary dressing wheel, a carrier therefor, a straight line guide, a continuously traveling work support limited to movement along said guide in the plane of the wheel rotation or progressing work past said wheel, a ulcrum for the carrier located below the working position of the wheel, a drive on the carrier for the wheel and disposed laterally of thei'ulcrum .oppositely from the wheel, and an oscillator on the carrier for effecting transverse reciprocation between the work on the support and said wheel.

14:. A rotary dressing wheel, a carrier therefor, a straight line guide, a continuously traveling work support limited to movement along said guide in the plane of the wheel rotation for progressing work past said wheel, a horizontal axis fulcrum for the carrier located below the work coacting position of the wheel, a drive on the carrier for the wheel and disposed laterally of the fulcrum and opposite from the wheel, and an oscillator on the carrier for the wheel for eecting transverse reciprocation of the rotating wheel as to the work on the support.

15. A rotary dressing wheel, a relatively traveling work support, said wheel movable in operationv for acting on said support but for the intervening work, and a work position-eecting control movable relatively to the work supporting wheel for rendering said wheel ineective for acting on the support as the support is clear of the work.

16. A rotary dressing wheel, a relatively traveling work support, said wheel movable in operation for acting on said support but for the intervening work, and an automatic cut-in movable relatively to the work supporting wheel for the wheel for rendering said wheel ehq'ective for acting on work on the support as the support is charged with work.

17. Work dressing equipment comprising an endless conveyor, work engaging flights on said conveyor, a drive for the conveyor, a plurality of independent rockably mounted rotary dressing wheels movable radially into position for coacting with work on said conveyor in sequence, an independent drive for each wheel, a common mounting for the wheel and drive as a unit, a pivot bearing for the mounting directing the wheel toward the approaching direction of the flights of the conveyor, and a stop device effective for shutting down the conveyor and wheel drives.

18. A work dressing machine comprising an endless conveyor, a fra-me therefor, a conveyor drive carried by the frame, dressing wheels disposed along said conveyor, independent carriers for said wheels pivotally mounted on said frame and overhanging the conveyor toward the direction of conveyor travel, a wheel actuating motor on each carrier, means on the conveyor positioning work for said wheels, and loading means determining the pressure on said wheels toward said work.

19. Work dressing equipment comprising an endless conveyor, work engaging flights on said conveyor, a motor for driving the conveyor, a main support, a series of auxiliary supports independently rockably mounted on the main support, a rotary dressing wheel on each auxiliary support movable radially into position for coacting with work on said conveyor in sequence, an independent motorv on each auxiliary support for each wheel-and rockable therewith as a unit, and independent cut-in switches for the separate motors and the conveyor drive.

20. Work dressing equipment comprising an endless conveyor, work engaging liights on said conveyor, a drive for the conveyor, a main support, a series of independently rockable auxiliary supports on the main support,

' rotary dressing wheels on said respective auxiliary supports movable radially into position for coacting with work on said conveyor in sequence, an independent motor on each auxiliary support for rocking therewith, transmission connections between the motors and Wheels, and means permitting rocking of the wheels independently clear of working position and independently of stopping the wheels.

21. A Work dressing machine comprising an endless conveyor, a main support therefor, a conveyor drive carried by the support, a series of dressing wheels disposed along said conveyor, independent auxiliary supports for said wheels, horizontal axis-providing bearings pivotally mounting said respective auxiliary supports on said main support locating the wheels for overhangingthe conveyor, a wheel actuating motor on each auxiliary support oppositely of its bearing from the wheel, and means on the conveyor positioning work for said wheels.

22. An abrading machine comprising ai traveling support for work, a rotatable abrading element, a shiftable control coacting in the Zone of work progress of the traveling support independently of the position of the abrading element and automatically movable when the support region is clear of the Work for rendering said element ineffective for acting on said work at any position of the element, and resetting means coacting with the work on the support for acting on said control for allowing the abrading element to move into working position to act on said work.

In Witness whereof I affix my signature.

WILLIAM C. GROB.

iso 

